Wato Tachibana has just returned to Japan after working as a volunteer doctor in Syria. She’s greeted at the airport by her mentor, Takayuki Mizuno. He suddenly collapses and dies after his stomach explodes. The case is assigned to Inspector Reimon and Sergeant Shibata of the Tokyo Metropolitan Police. They work alongside Miss Sherlock, a talented and arrogant consulting detective. Wato helps out, determined to understand Mizuno’s death and give closure to his widow. Sherlock discovers the cause of death was a remotely triggered bomb. Will they find the culprit before more deaths occur?